/* -------------------------------------------------------------------------
 *
 * pg_wchar.h
 *	  multibyte-character support
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/mb/pg_wchar.h
 *
 *	NOTES
 *		This is used both by the backend and by libpq, but should not be
 *		included by libpq client programs.	In particular, a libpq client
 *		should not assume that the encoding IDs used by the version of libpq
 *		it's linked to match up with the IDs declared here.
 *
 * -------------------------------------------------------------------------
 */
#ifndef PG_WCHAR_H
#define PG_WCHAR_H

#ifndef WIN32
#include <langinfo.h>
#endif

/*
 * The pg_wchar type
 */
typedef unsigned int pg_wchar;

/*
 * various definitions for EUC
 */
#define SS2 0x8e /* single shift 2 (JIS0201) */
#define SS3 0x8f /* single shift 3 (JIS0212) */

/*
 * SJIS validation macros
 */
#define ISSJISHEAD(c) (((c) >= 0x81 && (c) <= 0x9f) || ((c) >= 0xe0 && (c) <= 0xfc))
#define ISSJISTAIL(c) (((c) >= 0x40 && (c) <= 0x7e) || ((c) >= 0x80 && (c) <= 0xfc))

/*
 * Leading byte types or leading prefix byte for MULE internal code.
 * See http://www.xemacs.org for more details.	(there is a doc titled
 * "XEmacs Internals Manual", "MULE Character Sets and Encodings"
 * section.)
 */
/*
 * Is a leading byte for "official" single byte encodings?
 */
#define IS_LC1(c) ((unsigned char)(c) >= 0x81 && (unsigned char)(c) <= 0x8d)
/*
 * Is a prefix byte for "private" single byte encodings?
 */
#define LCPRV1_A 0x9a
#define LCPRV1_B 0x9b
#define IS_LCPRV1(c) ((unsigned char)(c) == LCPRV1_A || (unsigned char)(c) == LCPRV1_B)
#define IS_LCPRV1_A_RANGE(c) ((unsigned char)(c) >= 0xa0 && (unsigned char)(c) <= 0xdf)
#define IS_LCPRV1_B_RANGE(c) ((unsigned char)(c) >= 0xe0 && (unsigned char)(c) <= 0xef)
/*
 * Is a leading byte for "official" multibyte encodings?
 */
#define IS_LC2(c) ((unsigned char)(c) >= 0x90 && (unsigned char)(c) <= 0x99)
/*
 * Is a prefix byte for "private" multibyte encodings?
 */
#define LCPRV2_A 0x9c
#define LCPRV2_B 0x9d
#define IS_LCPRV2(c) ((unsigned char)(c) == LCPRV2_A || (unsigned char)(c) == LCPRV2_B)
#define IS_LCPRV2_A_RANGE(c) ((unsigned char)(c) >= 0xf0 && (unsigned char)(c) <= 0xf4)
#define IS_LCPRV2_B_RANGE(c) ((unsigned char)(c) >= 0xf5 && (unsigned char)(c) <= 0xfe)

/* ----------------------------------------------------
 * leading characters
 * ----------------------------------------------------
 */

/*
 * Official single byte encodings (0x81-0x8e)
 */
#define LC_ISO8859_1 0x81 /* ISO8859 Latin 1 */
#define LC_ISO8859_2 0x82 /* ISO8859 Latin 2 */
#define LC_ISO8859_3 0x83 /* ISO8859 Latin 3 */
#define LC_ISO8859_4 0x84 /* ISO8859 Latin 4 */
#define LC_TIS620 0x85    /* Thai (not supported yet) */
#define LC_ISO8859_7 0x86 /* Greek (not supported yet) */
#define LC_ISO8859_6 0x87 /* Arabic (not supported yet) */
#define LC_ISO8859_8 0x88 /* Hebrew (not supported yet) */
#define LC_JISX0201K 0x89 /* Japanese 1 byte kana */
#define LC_JISX0201R 0x8a /* Japanese 1 byte Roman */
/* Note that 0x8b seems to be unused as of Emacs 20.7.
 * However, there might be a chance that 0x8b could be used
 * in later version of Emacs.
 */
#define LC_KOI8_R 0x8b    /* Cyrillic KOI8-R */
#define LC_KOI8_U 0x8b    /* Cyrillic KOI8-U */
#define LC_ISO8859_5 0x8c /* ISO8859 Cyrillic */
#define LC_ISO8859_9 0x8d /* ISO8859 Latin 5 (not supported yet) */
/* FREE				0x8e	free (unused) */

/*
 * Unused
 */
#define CONTROL_1 0x8f /* control characters (unused) */

/*
 * Official multibyte byte encodings (0x90-0x99)
 * 0x9a-0x9d are free. 0x9e and 0x9f are reserved.
 */
#define LC_JISX0208_1978 0x90 /* Japanese Kanji, old JIS (not supported) */
#define LC_GB2312_80 0x91     /* Chinese */
#define LC_JISX0208 0x92      /* Japanese Kanji (JIS X 0208) */
#define LC_KS5601 0x93        /* Korean */
#define LC_JISX0212 0x94      /* Japanese Kanji (JIS X 0212) */
#define LC_CNS11643_1 0x95    /* CNS 11643-1992 Plane 1 */
#define LC_CNS11643_2 0x96    /* CNS 11643-1992 Plane 2 */
/* FREE				0x97	free (unused) */
#define LC_BIG5_1 0x98 /* Plane 1 Chinese traditional (not supported) */
#define LC_BIG5_2 0x99 /* Plane 1 Chinese traditional (not supported) */

/*
 * Private single byte encodings (0xa0-0xef)
 */
#define LC_SISHENG                         \
    0xa0 /* Chinese SiSheng characters for \
          * PinYin/ZhuYin (not supported) */
#define LC_IPA                                       \
    0xa1 /* IPA (International Phonetic Association) \
          * (not supported) */
#define LC_VISCII_LOWER                          \
    0xa2 /* Vietnamese VISCII1.1 lower-case (not \
          * supported) */
#define LC_VISCII_UPPER                                                 \
    0xa3                        /* Vietnamese VISCII1.1 upper-case (not \
                                 * supported) */
#define LC_ARABIC_DIGIT 0xa4    /* Arabic digit (not supported) */
#define LC_ARABIC_1_COLUMN 0xa5 /* Arabic 1-column (not supported) */
#define LC_ASCII_RIGHT_TO_LEFT                  \
    0xa6 /* ASCII (left half of ISO8859-1) with \
          * right-to-left direction (not        \
          * supported) */
#define LC_LAO                                                               \
    0xa7                        /* Lao characters (ISO10646 0E80..0EDF) (not \
                                 * supported) */
#define LC_ARABIC_2_COLUMN 0xa8 /* Arabic 1-column (not supported) */

/*
 * Private multibyte encodings (0xf0-0xff)
 */
#define LC_INDIAN_1_COLUMN                                                   \
    0xf0                         /* Indian charset for 1-column width glypps \
                                  * (not supported) */
#define LC_TIBETAN_1_COLUMN 0xf1 /* Tibetan 1 column glyph (not supported) */
#define LC_ETHIOPIC 0xf5         /* Ethiopic characters (not supported) */
#define LC_CNS11643_3 0xf6       /* CNS 11643-1992 Plane 3 */
#define LC_CNS11643_4 0xf7       /* CNS 11643-1992 Plane 4 */
#define LC_CNS11643_5 0xf8       /* CNS 11643-1992 Plane 5 */
#define LC_CNS11643_6 0xf9       /* CNS 11643-1992 Plane 6 */
#define LC_CNS11643_7 0xfa       /* CNS 11643-1992 Plane 7 */
#define LC_INDIAN_2_COLUMN                                          \
    0xfb                /* Indian charset for 2-column width glypps \
                         * (not supported) */
#define LC_TIBETAN 0xfc /* Tibetan (not supported) */
/*  FREE				0xfd	free (unused) */
/*  FREE				0xfe	free (unused) */
/*  FREE				0xff	free (unused) */

#define PG_INVALID_ENCODING -1
/*
 * openGauss encoding identifiers
 *
 * WARNING: the order of this enum must be same as order of entries
 *			in the pg_enc2name_tbl[] array (in mb/encnames.c), and
 *			in the pg_wchar_table[] array (in mb/wchar.c)!
 *
 *			If you add some encoding don't forget to check
 *			PG_ENCODING_BE_LAST macro.
 *
 * PG_SQL_ASCII is default encoding and must be = 0.
 *
 * XXX	We must avoid renumbering any backend encoding until libpq's major
 * version number is increased beyond 5; it turns out that the backend
 * encoding IDs are effectively part of libpq's ABI as far as 8.2 initdb and
 * psql are concerned.
 */
typedef enum pg_enc {
    PG_SQL_ASCII = 0, /* SQL/ASCII */
    PG_EUC_JP,        /* EUC for Japanese */
    PG_EUC_CN,        /* EUC for Chinese */
    PG_EUC_KR,        /* EUC for Korean */
    PG_EUC_TW,        /* EUC for Taiwan */
    PG_EUC_JIS_2004,  /* EUC-JIS-2004 */
    // supports GBK for server encoding
    PG_GBK,           /* GBK (Windows-936) */
    PG_UTF8,          /* Unicode UTF8 */
    PG_MULE_INTERNAL, /* Mule internal code */
    PG_LATIN1,        /* ISO-8859-1 Latin 1 */
    PG_LATIN2,        /* ISO-8859-2 Latin 2 */
    PG_LATIN3,        /* ISO-8859-3 Latin 3 */
    PG_LATIN4,        /* ISO-8859-4 Latin 4 */
    PG_LATIN5,        /* ISO-8859-9 Latin 5 */
    PG_LATIN6,        /* ISO-8859-10 Latin6 */
    PG_LATIN7,        /* ISO-8859-13 Latin7 */
    PG_LATIN8,        /* ISO-8859-14 Latin8 */
    PG_LATIN9,        /* ISO-8859-15 Latin9 */
    PG_LATIN10,       /* ISO-8859-16 Latin10 */
    PG_WIN1256,       /* windows-1256 */
    PG_WIN1258,       /* Windows-1258 */
    PG_WIN866,        /* (MS-DOS CP866) */
    PG_WIN874,        /* windows-874 */
    PG_KOI8R,         /* KOI8-R */
    PG_WIN1251,       /* windows-1251 */
    PG_WIN1252,       /* windows-1252 */
    PG_ISO_8859_5,    /* ISO-8859-5 */
    PG_ISO_8859_6,    /* ISO-8859-6 */
    PG_ISO_8859_7,    /* ISO-8859-7 */
    PG_ISO_8859_8,    /* ISO-8859-8 */
    PG_WIN1250,       /* windows-1250 */
    PG_WIN1253,       /* windows-1253 */
    PG_WIN1254,       /* windows-1254 */
    PG_WIN1255,       /* windows-1255 */
    PG_WIN1257,       /* windows-1257 */
    PG_KOI8U,         /* KOI8-U */
    PG_GB18030,       /* GB18030 */
    /* PG_ENCODING_BE_LAST points to the above entry */

    /* followings are for client encoding only */
    PG_SJIS,           /* Shift JIS (Winindows-932) */
    PG_BIG5,           /* Big5 (Windows-950) */
    PG_UHC,            /* UHC (Windows-949) */
    PG_JOHAB,          /* EUC for Korean JOHAB */
    PG_SHIFT_JIS_2004, /* Shift-JIS-2004 */
    _PG_LAST_ENCODING_ /* mark only */

} pg_enc;

#define PG_ENCODING_BE_LAST PG_GB18030

/*
 * Please use these tests before access to pg_encconv_tbl[]
 * or to other places...
 */
#define PG_VALID_BE_ENCODING(_enc) ((_enc) >= 0 && (_enc) <= PG_ENCODING_BE_LAST)

#define PG_ENCODING_IS_CLIENT_ONLY(_enc) ((_enc) > PG_ENCODING_BE_LAST && (_enc) < _PG_LAST_ENCODING_)

#define PG_VALID_ENCODING(_enc) ((_enc) >= 0 && (_enc) < _PG_LAST_ENCODING_)

/* On FE are possible all encodings */
#define PG_VALID_FE_ENCODING(_enc) PG_VALID_ENCODING(_enc)

#define IS_UNICODE_ENCODING(_enc) ((_enc) == PG_UTF8)

/*
 * When converting strings between different encodings, we assume that space
 * for converted result is 4-to-1 growth in the worst case. The rate for
 * currently supported encoding pairs are within 3 (SJIS JIS X0201 half width
 * kanna -> UTF8 is the worst case).  So "4" should be enough for the moment.
 *
 * Note that this is not the same as the maximum character width in any
 * particular encoding.
 */
#define MAX_CONVERSION_GROWTH 4

/*
 * Encoding names with all aliases
 */
typedef struct pg_encname {
    char* name;
    pg_enc encoding;
} pg_encname;

extern pg_encname pg_encname_tbl[];
extern unsigned int pg_encname_tbl_sz;

extern pg_enc pg_enc_coll_map_b[];
#define FAST_GET_CHARSET_BY_COLL(coll_oid) \
    (pg_enc_coll_map_b[(coll_oid - B_FORMAT_COLLATION_OID_MIN) / B_FORMAT_COLLATION_INTERVAL])

/*
 * Careful:
 *
 * if (PG_VALID_ENCODING(encoding))
 *		pg_enc2name_tbl[ encoding ];
 */
typedef struct pg_enc2name {
    char* name;
    pg_enc encoding;
#ifdef WIN32
    unsigned codepage; /* codepage for WIN32 */
#endif
} pg_enc2name;

extern pg_enc2name pg_enc2name_tbl[];

/*
 * Encoding names for gettext
 */
typedef struct pg_enc2gettext {
    pg_enc encoding;
    const char* name;
} pg_enc2gettext;

extern pg_enc2gettext pg_enc2gettext_tbl[];

/*
 * pg_wchar stuff
 */
typedef int (*mb2wchar_with_len_converter)(const unsigned char* from, pg_wchar* to, int len);

typedef int (*wchar2mb_with_len_converter)(const pg_wchar* from, unsigned char* to, int len);

typedef int (*mblen_converter)(const unsigned char* mbstr);

typedef int (*mbdisplaylen_converter)(const unsigned char* mbstr);

typedef bool (*mbcharacter_incrementer)(unsigned char* mbstr, int len);

typedef int (*mbverifier)(const unsigned char* mbstr, int len);

typedef struct {
    mb2wchar_with_len_converter mb2wchar_with_len; /* convert a multibyte
                                                    * string to a wchar */
    wchar2mb_with_len_converter wchar2mb_with_len; /* convert a wchar
                                                    * string to a multibyte */
    mblen_converter mblen;                         /* get byte length of a char */
    mbdisplaylen_converter dsplen;                 /* get display width of a char */
    mbverifier mbverify;                           /* verify multibyte sequence */
    int maxmblen;                                  /* max bytes for a char in this encoding */
} pg_wchar_tbl;

extern pg_wchar_tbl pg_wchar_table[];

/*
 * Data structures for conversions from gb18030 code to nlssort code.
 * In these data structures, characters of
 * either encoding are represented by uint32 words; hence we can only support
 * characters up to 4 bytes long.  For example, the byte sequence 0xC2 0x89
 * would be represented by 0x0000C289, and 0xE8 0xA2 0xB4 by 0x00E8A2B4.
 *
 * Maps are arrays of these structs, which must be in order by the lookup key
 * (so that bsearch() can be used).
 *
 * nlssort_encode_simple: uint32 to uint32
 * nlssort_encode_complex: uint32 to uint64
 */
typedef struct {
    uint32 gb18030_code;  /* gb18030 code */
    uint32 nlssort_code;  /* nlssort code */
} nlssort_encode_simple;

typedef struct {
    uint32 gb18030_code;  /* gb18030 code */
    uint64 nlssort_code;  /* nlssort code */
} nlssort_encode_complex;

/*
 * Data structures for conversions between UTF-8 and other encodings
 * (UtfToLocal() and LocalToUtf()).  In these data structures, characters of
 * either encoding are represented by uint32 words; hence we can only support
 * characters up to 4 bytes long.  For example, the byte sequence 0xC2 0x89
 * would be represented by 0x0000C289, and 0xE8 0xA2 0xB4 by 0x00E8A2B4.
 *
 * Maps are arrays of these structs, which must be in order by the lookup key
 * (so that bsearch() can be used).
 *
 * UTF-8 to local code conversion map
 */
typedef struct {
    uint32 utf;  /* UTF-8 */
    uint32 code; /* local code */
} pg_utf_to_local;

/*
 * local code to UTF-8 conversion map
 */
typedef struct {
    uint32 code; /* local code */
    uint32 utf;  /* UTF-8 */
} pg_local_to_utf;

/*
 * UTF-8 to local code conversion map (for combined characters)
 */
typedef struct {
    uint32 utf1; /* UTF-8 code 1 */
    uint32 utf2; /* UTF-8 code 2 */
    uint32 code; /* local code */
} pg_utf_to_local_combined;

/*
 * local code to UTF-8 conversion map (for combined characters)
 */
typedef struct {
    uint32 code; /* local code */
    uint32 utf1; /* UTF-8 code 1 */
    uint32 utf2; /* UTF-8 code 2 */
} pg_local_to_utf_combined;

/*
 * callback function for algorithmic encoding conversions (in either direction)
 *
 * if function returns zero, it does not know how to convert the code
 */
typedef uint32 (*utf_local_conversion_func) (uint32 code);

/*
 * Support macro for encoding conversion functions to validate their
 * arguments.  (This could be made more compact if we included fmgr.h
 * here, but we don't want to do that because this header file is also
 * used by frontends.)
 */
#define CHECK_ENCODING_CONVERSION_ARGS(srcencoding, destencoding) \
    check_encoding_conversion_args(                               \
        PG_GETARG_INT32(0), PG_GETARG_INT32(1), PG_GETARG_INT32(4), (srcencoding), (destencoding))

/*
 * These functions are considered part of libpq's exported API and
 * are also declared in libpq-fe.h.
 */
extern "C" int pg_char_to_encoding(const char* name);
extern "C" const char* pg_encoding_to_char(int encoding);
extern "C" int pg_valid_server_encoding_id(int encoding);

/*
 * Remaining functions are not considered part of libpq's API, though many
 * of them do exist inside libpq.
 */
extern pg_encname* pg_char_to_encname_struct(const char* name);

extern int pg_mb2wchar(const char* from, pg_wchar* to);
extern int pg_mb2wchar_with_len(const char* from, pg_wchar* to, int len);
extern int pg_encoding_mb2wchar_with_len(int encoding, const char* from, pg_wchar* to, int len);
extern int pg_wchar2mb(const pg_wchar* from, char* to);
extern int pg_wchar2mb_with_len(const pg_wchar* from, char* to, int len);
extern int pg_encoding_wchar2mb_with_len(int encoding, const pg_wchar* from, char* to, int len);
extern int pg_char_and_wchar_strcmp(const char* s1, const pg_wchar* s2);
extern int pg_wchar_strncmp(const pg_wchar* s1, const pg_wchar* s2, size_t n);
extern int pg_char_and_wchar_strncmp(const char* s1, const pg_wchar* s2, size_t n);
extern size_t pg_wchar_strlen(const pg_wchar* wstr);
extern int pg_mblen(const char* mbstr);
extern int pg_dsplen(const char* mbstr);
extern int pg_encoding_mblen(int encoding, const char* mbstr);
extern int pg_encoding_dsplen(int encoding, const char* mbstr);
extern int pg_encoding_verifymb(int encoding, const char* mbstr, int len);
extern int pg_mule_mblen(const unsigned char* mbstr);
extern int pg_mic_mblen(const unsigned char* mbstr);
extern int pg_mbstrlen(const char* mbstr);
extern int pg_mbstrlen_with_len(const char* mbstr, int len);
extern int pg_mbstrlen_with_len_eml(const char* mbstr, int len, int eml);
extern int pg_mbstrlen_with_len_toast(const char* mbstr, int* limit);
extern int pg_encoding_mbstrlen_with_len(const char* mbstr, int limit, int encoding);
extern int pg_mbcliplen(const char* mbstr, int len, int limit);
extern int pg_encoding_mbcliplen(int encoding, const char* mbstr, int len, int limit);
extern int pg_mbcharcliplen(const char* mbstr, int len, int imit);
extern int pg_mbcharcliplen_orig(const char* mbstr, int len, int limit);
extern int pg_encoding_max_length(int encoding);
extern int pg_database_encoding_max_length(void);
extern mbcharacter_incrementer pg_database_encoding_character_incrementer(void);

extern int PrepareClientEncoding(int encoding);
extern int SetClientEncoding(int encoding);
extern void InitializeClientEncoding(void);
extern int pg_get_client_encoding(void);
extern const char* pg_get_client_encoding_name(void);

extern void SetDatabaseEncoding(int encoding);
extern int GetDatabaseEncoding(void);
extern const char* GetDatabaseEncodingName(void);
extern int GetCharsetConnection(void);
extern const char* GetCharsetConnectionName(void);
extern Oid GetCollationConnection(void);
extern int GetPlatformEncoding(void);
extern void pg_bind_textdomain_codeset(const char* domainname);

extern int pg_valid_client_encoding(const char* name);
extern int pg_valid_server_encoding(const char* name);

extern unsigned char* unicode_to_utf8(pg_wchar c, unsigned char* utf8string);
extern pg_wchar utf8_to_unicode(const unsigned char* c);
extern int pg_utf_mblen(const unsigned char*);
extern unsigned char* pg_do_encoding_conversion(unsigned char* src, int len, int src_encoding, int dest_encoding);
extern void construct_conversion_fmgr_info(int src_encoding, int dst_encoding, void* finfo);
extern char* try_fast_encoding_conversion(
    char* src, int len, int src_encoding, int dest_encoding, void* convert_finfo);

extern char* pg_client_to_server(const char* s, int len);
extern char* pg_server_to_client(const char* s, int len);
extern char* pg_any_to_server(const char* s, int len, int encoding);
extern char* pg_server_to_any(const char* s, int len, int encoding, void* convert_finfo = NULL);
extern char* pg_any_to_client(const char* s, int len, int encoding, void* convert_finfo = NULL);
extern bool WillTranscodingBePerformed(int encoding);

extern unsigned short BIG5toCNS(unsigned short big5, unsigned char* lc);
extern unsigned short CNStoBIG5(unsigned short cns, unsigned char lc);

extern void LocalToUtf(const unsigned char *iso, int len, unsigned char *utf, const pg_local_to_utf *map, int mapsize,
    const pg_local_to_utf_combined *cmap, int cmapsize, utf_local_conversion_func conv_func, int encoding);

extern void UtfToLocal(const unsigned char *utf, int len, unsigned char *iso, const pg_utf_to_local *map, int mapsize,
    const pg_utf_to_local_combined *cmap, int cmapsize, utf_local_conversion_func conv_func, int encoding);

extern bool pg_verifymbstr(const char* mbstr, int len, bool noError);
extern bool pg_verify_mbstr(int encoding, const char* mbstr, int len, bool noError);
extern int pg_verify_mbstr_len(int encoding, const char* mbstr, int len, bool noError);

extern void check_encoding_conversion_args(
    int src_encoding, int dest_encoding, int len, int expected_src_encoding, int expected_dest_encoding);

extern void report_invalid_encoding(int encoding, const char* mbstr, int len);
extern void report_untranslatable_char(int src_encoding, int dest_encoding, const char* mbstr, int len);

extern void pg_ascii2mic(const unsigned char* l, unsigned char* p, int len);
extern void pg_mic2ascii(const unsigned char* mic, unsigned char* p, int len);
extern void latin2mic(const unsigned char* l, unsigned char* p, int len, int lc, int encoding);
extern void mic2latin(const unsigned char* mic, unsigned char* p, int len, int lc, int encoding);
extern void latin2mic_with_table(
    const unsigned char* l, unsigned char* p, int len, int lc, int encoding, const unsigned char* tab);
extern void mic2latin_with_table(
    const unsigned char* mic, unsigned char* p, int len, int lc, int encoding, const unsigned char* tab);

extern bool pg_utf8_islegal(const unsigned char* source, int length);
extern bool pg_gbk_islegal(const unsigned char* source, int length);

extern char* gs_setlocale_r(int category, const char* locale);
#ifndef WIN32
extern char* gs_nl_langinfo_r(nl_item item);
#else
extern char* gs_nl_langinfo_r(const char* ctype);
#endif

#ifdef WIN32
extern WCHAR* pgwin32_toUTF16(const char* str, int len, int* utf16len);
#endif

#define DB_ENCODING_SWITCH_TO(tmp_encoding)                     \
    do {                                                        \
        SetDatabaseEncoding(tmp_encoding);                      \
        uint32 save_count = t_thrd.int_cxt.InterruptHoldoffCount; \
        PG_TRY();                                               \
        {                                                       \

#define DB_ENCODING_SWITCH_BACK(db_encoding)                    \
        }                                                       \
        PG_CATCH();                                             \
        {                                                       \
            t_thrd.int_cxt.InterruptHoldoffCount = save_count;  \
            SetDatabaseEncoding(db_encoding);                   \
            PG_RE_THROW();                                      \
        }                                                       \
        PG_END_TRY();                                           \
        SetDatabaseEncoding(db_encoding);                       \
    } while (0)                                                 \

#endif /* PG_WCHAR_H */
